//
//  YCTabBar.swift
//  YCWeibo009
//
//  Created by user on 15/11/28.
//  Copyright © 2015年 user. All rights reserved.
//

import UIKit

class YCTabBar: UITabBar {

    override func layoutSubviews() {
        
        //计算item的宽度
        let width = bounds.size.width / 5
        
        //创建form
        let frame = CGRect(x: 0, y: 0, width: width, height: bounds.size.height)
        
        
        //记录是第几个view
        var index = 0
        //重新设置按钮的位置
        for view in self.subviews{
            if view is UIControl && !(view is UIButton){ //撰写按钮不需要来设置frame，忽略撰写按钮
            
                //设置frame,CGRectOffset可以平移frame
                view.frame = CGRectOffset(frame, CGFloat(index) * width, 0)
                
//                index++
//                if index == 2{
//                    index++
//                }
                index += index == 1 ? 2 : 1
            }
        }
        //设置撰写按钮的frame
        composeButton.frame = CGRectOffset(frame, 2 * width, 0)
    }
    
    //懒加载
    ///撰写按钮
    lazy var composeButton:UIButton = {
        let button = UIButton()
        
        //设置参数，按钮背景
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        
        //高亮状态
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState:UIControlState.Highlighted)
        
        //设置按钮图片
        button.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        //高亮状态
        button.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        
        //添加到tabbar里面
        self.addSubview(button)
        return button
    }()
}
